Arduino Serial monitor

Projects Programming
1

Hi everyone, I'm a beginner code writer, I want to do an automatic irrigation project. But I have a problem. I wrote basic code and run but on the serial monitor appeared question marks, ı didnt understand(baud numbers same).

20240820_230341
20240820_2303411920×995 225 KB

2

show the code that produced that, it's the only way we can help.

3

Okey I'm showing my code

Screenshot_20240821_013955_YouTube
Screenshot_20240821_013955_YouTube1920×1874 114 KB

Screenshot_20240821_014015_YouTube
Screenshot_20240821_014015_YouTube946×827 78.8 KB

4

Try that again.
In code tags, please. Haven't you read:

5

looks like a mismatch between the monitor baudrate and your begin statement.

1 Like
6

in order to "post the code"

try copying the code from the IDE by placing the mouse over the code, pressing ctl-A to select all the text and ctl-C to copy it

then in the browser window with this thread create a reply and with the mouse in the reply, hit the <code> icon and in the highlighted area, paste the code by hitting ctl-V

please give it a try

7

FWIW, shift-ctrl-c does a Forum-compatible copy, allowing a simple ctrl-v without the <code> button step. Six of one, half dozen of the other. "Copy for Forum" is also a menu entry.

8

You code screenshots are from Arduino 1.8.12, but the Serial Monitor screenshot is from IDE 2.x. Which version is it? This looks like a bug that was fixed in 2.0.4.

9

Yes, ı took screenshots on internet and ı have tried it in my arduino program.

10

My code is ;

int rolePin = 2;
int nemPin = A0;

int nemdegeri;
int nemEsikdegeri = 15;

//When the soil moisture value drops below 15 percent, the water pump will start
//You can change this moisture rate according to your own wishes.

void setup()
{
  pinMode(rolePin, OUTPUT);
  pinMode(nemPin, INPUT);
  Serial.begin(9600);
}

void loop()
{
  nemdegeri = map(analogRead(nemPin),1023,0,0,100);
  Serial.print("Nem Değeri: %");
  Serial.println(nemdegeri);

  if(nemdegeri > nemEsikdegeri)
  {
    digitalWrite(rolePin, HIGH);
  }
  else
  {
    digitalWrite(rolePin, LOW);
  }
  
  delay(100);
}
11

is this all of it?
i don't see where "Sulama Yapilmior" is printed

i get the following when i run the code you posted

Nem Değeri: %15
Nem Değeri: %15
Nem Değeri: %15
Nem Değeri: %15
Nem Değeri: %15
Nem Değeri: %15
Nem Değeri: %15
Nem Değeri: %15
Nem Değeri: %15
Nem Değeri: %15
Nem Değeri: %15
Nem Değeri: %15
Nem Değeri: %15
Nem Değeri: %15
Nem Değeri: %15
Nem Değeri: %15
Nem Değeri: %15
Nem Değeri: %15
Nem Değeri: %15
Nem Değeri: %15
Nem Değeri: %15
12

When ı connected moisture sensor, the serial monitor shows interesting marks. Do you think that there is a problem?

13

Hi, @tahsin55
Welcome to the forum.

What model Arduino are you using?

Can you please post a copy of your circuit, a picture of a hand drawn circuit in jpg, png?
Hand drawn and photographed is perfectly acceptable.
Please include ALL hardware, power supplies, component names and pin labels.

Thanks.. Tom.. :smiley: :+1: :coffee: :australia:

14

can't say without seeing the code

15

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